Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
cuc tieu » muc tieu, cac tieu, cach tieu
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
tu sach » thu sach, su sach, te sach

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly ((nang ma) OR (tang ma)) hoi. hieu ve ((cam duc) or (giao duc)) van doanh tai cuc tieu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly ((nang ma) OR (tang ma)) hoi. hieu ve ((cam duc) OR (giao duc)) van doanh tai cuc tieu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly ((nang ma) OR (tang ma)) hoi. hieu ve ((cam duc) or (giao duc)) van doanh tai cuc tieu".
• Adding a wildcard symbol may retrieve word variants: tu sach ly ((nang ma) OR (tang ma)) hoi. hieu ve ((cam duc) or (giao duc)) van doanh tai cuc tieu*.